GB1146561A - A constant potential current supply - Google Patents

A constant potential current supply

Info

Publication number
GB1146561A
GB1146561A GB763167A GB763167A GB1146561A GB 1146561 A GB1146561 A GB 1146561A GB 763167 A GB763167 A GB 763167A GB 763167 A GB763167 A GB 763167A GB 1146561 A GB1146561 A GB 1146561A
Authority
GB
United Kingdom
Prior art keywords
voltage
source
current
constant current
reference voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB763167A
Inventor
Clifford William Dougl Osborne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB763167A priority Critical patent/GB1146561A/en
Priority to DE19681638049 priority patent/DE1638049C3/en
Priority to SE191168A priority patent/SE330717B/xx
Priority to FR1554421D priority patent/FR1554421A/fr
Publication of GB1146561A publication Critical patent/GB1146561A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Electronic Switches (AREA)
  • Control Of Electrical Variables (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

1,146,561. Transistor switching circuits. STANDARD TELEPHONES & CABLES Ltd. 17 Feb., 1967, No. 7631/67. Heading H3T. A switching circuit for supply current to a load at a voltage determined by a reference voltage comprises a transistor switch T having its collector connected to one terminal of a source of reference voltage RP and its emitter connected to one output terminal P, its base connected through a switching device S1 to a source of higher voltage than the reference voltage and a constant current device CC connected between the higher voltage and the output terminal through the switching device S2. As described, the voltage drop across the transistor is very small because most of the output current is supplied from the constant current source and because the base current is such that it flows to the collector. In Fig. 2, TC is the constant current device and TF performs the function of S1 and S2 under the control of TI.
GB763167A 1967-02-17 1967-02-17 A constant potential current supply Expired GB1146561A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB763167A GB1146561A (en) 1967-02-17 1967-02-17 A constant potential current supply
DE19681638049 DE1638049C3 (en) 1967-02-17 1968-02-09 Circuit arrangement for an electronic switch
SE191168A SE330717B (en) 1967-02-17 1968-02-14
FR1554421D FR1554421A (en) 1967-02-17 1968-02-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB763167A GB1146561A (en) 1967-02-17 1967-02-17 A constant potential current supply

Publications (1)

Publication Number Publication Date
GB1146561A true GB1146561A (en) 1969-03-26

Family

ID=9836825

Family Applications (1)

Application Number Title Priority Date Filing Date
GB763167A Expired GB1146561A (en) 1967-02-17 1967-02-17 A constant potential current supply

Country Status (3)

Country Link
FR (1) FR1554421A (en)
GB (1) GB1146561A (en)
SE (1) SE330717B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057993A2 (en) * 1981-01-22 1982-08-18 Kabushiki Kaisha Toshiba Coffee maker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057993A2 (en) * 1981-01-22 1982-08-18 Kabushiki Kaisha Toshiba Coffee maker
EP0057993A3 (en) * 1981-01-22 1982-09-08 Tokyo Shibaura Denki Kabushiki Kaisha Coffee maker

Also Published As

Publication number Publication date
DE1638049B2 (en) 1976-01-02
FR1554421A (en) 1969-01-17
DE1638049A1 (en) 1971-06-16
SE330717B (en) 1970-11-30

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